Hoisting device.



B. A. POUST.

EOISIING DEVICE. APPLIOATION FILED r213. 2a. 1908.

905,864. Patented D0018, 190s.

- fiWmZM/MJZ BARRETT A. FOUST, OF MEADVILLE, PENNSYLVANIA.

nors'rmo DEVICE.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed February 28, 1908. Serial No. 418,321.

To all whom it may concern:

Be it known that I, BARRETT A. FOUST, a citizen of the United States,residing at Meadville, in the county of Crawford and State ofPennsylvania, have invented a new and useful Hoisting Device, of whichthe following is a specification.

This invention relates to hoisting devices and more particularly totackle blocks of that character designed for use in connection withshock loaders and similar devices utilizing hoisting ropes which aresuspended from carriages designed to convey hoisted bodies to points ofdelivery. Heretofore considerable trouble has been experienced inholding the shocks or other bodies being conveyed, in

' raised positions prior to their discharge onto the rack or otherreceptacle provided for them.

The object of the present invention is to provide a tackle block havingsimple means for automatically engaging the hoisting rope so as to lockit and prevent the hoisted material from lowering.

Another object is to provide simple means for releasing the rope.

A still further object is to provide a rope gripping device which issimple, durable and efficient and which will automatically adapt itselfto ropes of different sizes and extending at different angles to thehorizontal.

With these and other objects in view the invention consists of certainnovel features of construction and combinations of parts which will behereinafter more fully described and pointed out in the claims.

In the accompanying drawings is shown the preferred form of theinvention.

In said drawings: Figure 1 is a side elevation of the device, the samebeing shown by dotted lines in locking position. Fig. 2 is a plan viewof the parts shown in Fig, 1. Fig. 3 is a perspective view of thegripping shoe and its parts. Fig. 4 is a similar view of a portion ofthe tripping lever.

Referring to the figures by characters of reference, A designates thebody of the block, the same consisting of side plates 11 connected attheir upper ends by means of a cross bar 2 designed to be engaged by asupporting hook 3 or any other suitable means. From these plates extendsa guide yoke 4 integral therewith and extending across the periphery ofa sheave 5 journaled between at points diametrically opposite the yoke 4and fulcrumed upon these studs is a yokelike tripping lever 7 whichembraces the block A and has one of its arms elongated as indicated at 9and provided with a laterally extending finger 10 to which the trippingrope or cord 11 is secured.

Extending through the crown portion of the lever 7 is a pivot bolt 12upon the end portions of which are pivotally mounted links 18. The endsof these links are seated loosely within grooves 14 formed in the endsof a gripping shoe 15, said shoe being preferably formed of a metalplate having its end portion bent at right angles as indicated at 16 andprovided with the grooves 14 heretofore referred to. The side walls ofthese grooves preferably converge and constitute stops for limiting themovement of the shoe 15 relative to the links 13. The working face ofthe shoe 15 is preferably formed with diagonally disposed grooves 17designed to constitute seats for portions of the hoisting rope clampedby the shoe. The shoe 15 is connected to the links 18 by means of apivot bolt 18 which extends through the links and through the ends 16.

Formed upon the side plates 1 between the guide yoke 4 and the cross bar2 are laterally extending spacing flanges 19 which serve to hold links18 out of contact with the pulley block so that friction is thus reducedto the minimum. They also serve, in connection with the pivot bolt 12,to hold the links 18 so positioned as to prevent lateral displacement ofthe gripping shoe 15 relative to the flanges 19.

Formed within the lower portion of the tackle block A is a cross bar 20to which is bolted or otherwise secured a spacing block 21 having ashield or guard plate 22 secured thereto. This plate is preferablycurved upwardly toward its ends from its points of connection with block21 and that portion of the plate below the studs 6 has an elongated slot23 therein the edge portions of which are preferably provided withdownwardly extending guide flanges 24. An angular opening 25 ispreferably formed in that end of the plate 22 located below the guideyoke 4 and guide flanges 26 are preferably struck downward from theplate so as to constitute guards along the edges of this opening 25.

A stop lug 27 is formed upon one of the plates 1 and holds the brakeshoe in position the plates. Studs 6 extend from the plates to ride uponthe rope. It also holds the weighted portion of lever 7 at such an'angleas to balance finger 10 and trip rope 11 into set position.

The hoisting rope, which has been indicated at B, extends over thesheave 5 and through the yoke at and the yoke portion of lever 7. Thatend portion of this rope to which power is applied extends through theopening 23 while the other end portion is designed to normally restwithin the opening 25. The normal position of the shoe 15 is upon theyoke 1 as indicated by full lines in Fig. 1. When a shock of 'corn orother material is to be hoisted the free end of the rope B is extendedat an angle from the block as indicated in Fig. 1 and fastened to theshock, after which power is applied to the rope and the same is pulledin the direction of the arrow in Fig. 1. Inasmuch as the shoe 15 is incontact with the rope B it will be carried upward therewith and causethe links 13 to push against the yoke portion of lever 7 and when thebolt 1:2 and stud 6 are brought into line with the longitudinal centersof the links 13 the crown portion of lever 7 will swing clownward andcause arm 9 to swing upward until its finger 10 contacts with one of thelinks 13. The parts will then be positioned as indicated by dotted linesin Fig. 1. There will still be suflicient space between the grippingshoe 15 and the sheave to permit the rope B to continue its movement inthe direction of the arrow until the shock has been raised to a desiredelevation. When, however, the power is removed from the rope the weightof the shock will pull the rope for a short distance in the oppositedirection. As the gripping shoe 15 is in contact with the rope it willpress thereinto and be drawn downward therewith and held by yoke 4. Thegripping action of this shoe upon the rope will increase in proportionto the weight to which the rope is subjected and it will be obvioustherefore that downward movement of the shock will be absolutelyprevented as long as the parts are positioned as indicated by dottedlines. While the shock is thus held supported the tackle block can beconveyed by means of a supporting carriage, not shown, to any desiredpoint and the shock can then be lowered simply by pulling downward onrope 11. This will cause lever 7 to swing upon its bearings 6 and pushthe bolt 12 upward above said bearings whereupon the gripping shoe willbe released from frictional engagement with the rope B and said ropewill be free to move downward so as to lower the shock. By maintainingperpendicular that end portion of the rope to which the shock is to beattached the rope can be raised or lowered without interference by thegripping shoe but by extending the rope from the block at an angle asindicated in Fig. 1 the gripping shoe-will be caused to assume asetposition as heretofore stated so as to automatically engage and holdthe rope to prevent return movement. The gripping shoe 15 is pivotallyconnected to the links 13 so that it has a limited locking movementrelative thereto whereby it can automatically adjust itself to the rope.The guard or shield is useful inasmuch as it prevents portions of theshock from coming into contact with the working parts of the block.

Although the device has been described as particularly designed forhoisting shocks and the like and conveying them to points of dischargeit is to be understood that the same can also be used for any otherpurpose where it is desired to raise one or more objects and maintainthem in raised position until it is desired to lower them.

\Vhat is claimed is: i

1. The combination with a tackle block, a guide yoke extendingtherebeyond; of a tripping lever fulcrumed upon the block, a grippingshoe normally supported upon the yoke, and link connections between thetripping lever and the shoe, said lever being foldable upon the linkswhen the shoe is shifted in one direction to hold the shoe in grippingposition.

2. The combination with a tackle block having a rope supporting sheavetherein; of a tripping lever fulcrumed upon the block,

a gripping shoe disposed to frictionally engage and .to be shifted inone direction by the rope, and link connections between the shoe andlever, said connections being disposed to fold the lever against thelinks to lock the shoe in gripping position when the rope is moved inthe opposite direction.

3. The combination with a tackle block having a rope supporting sheavetherein, and a guide yoke extending from the block; of a tripping leverfulcrumed upon the block, a gripping shoe normally resting upon the yokeand disposed to frictionally engage and to be shifted by the rope whenmoved in one direction, and link connec tions between the shoe andtripping lever for transmitting motion from the shoe to the lever tofold said lever upon one of the links during said movement of thegripping shoe.

4. The combination with a tackle block having a rope supporting sheavetherein, and a guide yoke extending from the block; of a tripping leverfulcrumed upon the block, a gripping shoe normally resting upon the yokeand disposed to be shifted in one direction by the yoke, a pivotedconnection between the shoe and lever for transmitting motion from saidshoe to the lever to fold said lever upon the connection and lock theshoe in frictional engagement with the rope.

5. The combination with a tackle block having a rope supporting sheavetherein; of a tripping lever fulcrumed upon the block,

a gripping shoe disposed to be shifted into set position by the rope, apivoted connection between the shoe and lever for folding said leverupon the connection to lock the shoe in set position.

6. The combination with a tackle block having a rope supporting sheavetherein, and a guide yoke extending from the block; of a tripping leverfulcrumed upon the block, a gripping shoe normally mounted thereon anddisposed to be shifted into set position by the movement of the rope inone direction, means for transmitting motion from the shoe to thetripping lever to fold said lever against said means during saidmovement of the shoe, said shoe when set being positioned to bind uponthe rope and prevent its movement in one direction.

7. The combination with a tackle block having a rope supporting sheavetherein, and a guide yoke extending from the block; of a combined ropeguide and tripping lever fulcrumed upon the block, a gripping shoedisposed to be shifted in set position by the rope when moved in onedirection, and means for transmitting motion from the shoe to thetripping lever during said movement to fold the lever upon said means,said shoe when in set position being disposed to prevent movement of therope in one directlon.

8. The combination with a tackle block having a rope supportin sheavetherein and a guide yoke extending from the block; of a combined ropeguide and tripping lever fulcrumed upon the block, a gripping shoe nor-.mally supported upon the yoke, a link connection betweensaid shoe andthe tripping lever, said shoe being movable by the rope in arcseccentric to the sheave and said link connection and lever cooperatingto lock the shoe in gripping position.

9. The combination with a tackle block having a rope supporting sheavetherein, and a guide yoke extending from the block;

. of a combined rope guide and tripping lever fulcrumed upon the block,a gripping shoe normally resting upon the yoke and disposed to beshifted into set position thereby, a link connection between the shoeand tripping lever for transmitting motion to said lever from the shoeto fold the lever upon said connection when the shoe is in set position,and means for shifting the tripping lever out of folded position.

10. The combination with a tackle block having a rope supporting sheavethereon and a guide yoke extending from the block; of a combined ropeguide and tripping lever fulcrumed upon the block, links pivotallyconnected thereto, a gripping shoe connected to and mounted to rockbetween the links and normally resting upon the yoke, said shoe beingshiftable into set position by the rope to-fold the lever upon one ofthe links.

11. The combination with a tackle block having a rope supporting sheavethereon and a guide yoke extending from the block; of a combined ropeguide and tripping lever fulcrumed upon the block, links pivotallyconnected thereto, a gripping shoe connected to and mounted to rockbetween the links and normally resting upon the yoke, said shoe beingshiftable into set position by the rope to fold the lever upon one ofthe links, laterally extending spacing flanges upon the block andconstituting bearings for the links, and means for shifting the trippinglever out of folded position.

12. The combination with a tackle block having a rope supporting sheaveand a guide yoke extending from the block; of a guard plate connected toand extending under the block, said plate having rope receiving openingstherein, a gripping shoe normally mounted upon the yoke, atripping leverfulcrumed upon the block, link connections between the shoe and trippinglever, said shoe being shiftable into set position by the rope to foldthe tripping lever upon one of the links, said shoe when set beingmovable in a plane eccentric with the sheave, and means for shifting thetripping lever out of folded position to shift the shoe out of setposition.

In testimony that I claim the foregoing as my own, I have hereto affixedmy slgnature in the presence of two witnesses.

BARRETT A. FOUST. Witnesses L. L. LORD, L. L. LORD, Jr.

